Math, asked by Studyowl1, 1 year ago

sin²1° + sin²3° + ... + sin²89° = ?

Answers

Answered by hruthik2222
9
sin²1° + sin²3° + ... + sin²89° = Sin²1° + sin²3° +......+ cos²3° + cos²1° = (Sin²1° + cos²1°) + (sin²3° + cos²3°) + ......... (sin²43° + cos²43°) + sin² 45° = 22 + (1/√2)² = 45/2 = 22 (1/2)
Answered by Anurag19
14
   Sin²1° + sin²3° + ... + sin²89° 
= Sin²1° + sin²3° +......+ cos²3° + cos²1°
= (Sin²1° + cos²1°) + (sin²3° + cos²3°) + ......... (sin²43° + cos²43°) + sin² 45°
= 22 + (1/√2)²
= 45/2
= 22.5

Anurag19: mark it as brainliest
Anurag19: thanks
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